I need a Mathcad 8.0 professional version for download

Considering that there is no Mathcad Prime 8.0 "professional" you must be asking for "real" Mathcad 8.0 Professional, the program that was brought out in/around 1998. 

Well, you should read and understand this: https://community.ptc.com/t5/Mathcad-Tips/Official-PTC-Mathcad-15-and-Prime-1-6-End-of-Sale-Announcement/ta-p/818870 

I think your best options are, (and I assume you still own the CD with the installation source, and you saved the licensing information):

- Find a friend that owns a PC with CD drive to copy the contents of the CD over to a USB stick.

- Buy a CD/DVD drive with a USB interface to connect to your new PC, so that you can install the program. 

Success!

Luc

Hi @MD_8359501,

I wanted to see if you got the help you needed.

If so, please mark the appropriate reply as the Accepted Solution. It will help other members who may have the same question.
Of course, if you have more to share on your issue, please pursue the conversation. 

Thanks,
Anurag